Climate change can benefit individual species, but when pest species are enhanced by warmer temperatures agricultural productivity may be placed at greater risk. We analyzed the effects of temperature anomaly on arrival date and infestation severity of potato leafhopper, Empoasca fabae Harris, a classic new world long distance migrant, and a significant pest in several agricultural crops. We co...

Mutual interference involves direct interactions between individuals of the same species that may alter their foraging success. Larvae of aphidophagous coccinellids typically stay within a patch during their lifetime, displaying remarkable aggregation to their prey. Thus, as larvae are exposed to each other, frequent encounters may affect their foraging success. A study was initiated in order t...

1. The interaction between 'migratory flight', defined as flight oriented vertically and horizontally towards a large overhead light source, and 'targeted flight' oriented towards a yellow leaf-like object seen to one side against a dark background, has been analysed in Aphis fabae in a laboratory flight chamber. Landings were prevented by regulating a down-current of air so as to balance the f...

The triglyceride compositions of extracts and cornicie secretions of specimens from a range of aphid families were examined by mass spectrometry and found to support earlier evidence that there is little correlation between taxonomic position and chemical constitution. Parasites developing within Myzus pevsicae preferentially consumed the typical aphid triglycerides which contain hexanoic (C,),...